CHANGE_FILE_SYSTEM sometimes marks disk as changed unnecessarily

[Loïc Minier]

Hi

I'm doing a weird install: booting from a SD card on an armel imx51 babbage board and installing to that SD card.

The SD card image from Ubuntu has two primary partitions, one of a special non-FS type (contains the bootloader in a special subpartitioning scheme) and another primary partition with a VFAT containing the installer and all.

Before starting the install I'm creating partition 3 and 4 of type linux and linux swap, then running "ubiquity --debug".

At the partitioning screen, I selected to format part 3 as ext4 and to use part 4 as swap.

When the install started, I then got a popup telling me that it failed to unmount partitions, something like "Installer needs to change partition table but can't because /cdrom is still mounted; please close apps using this mount point etc." (translated). [Go back] [Continue]

I think the installer shouldn't have to unmount anything in this case. Hitting continue and I'm then dropped to the partitioner welcome screen; note that my choice of "Custom partitioning" has not been preserved and "Install side by side" is selected by default.

Bye